Witness breaks down on the stand as he talks about the day he watched his father and two brothers get shot.

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A son whose father and two brothers were fatally shot in San Francisco's Excelsior District as they drove home from a picnic in June 2008 testified today that he saw alleged MS-13 gang member Edwin Ramos fire the shots.

In testimony that began this morning and will continue this afternoon, Andrew Bologna said he saw Ramos shoot his father Anthony, 48, and his brothers Michael, 20, and Matthew, 16, as the family drove near Congdon and Maynard streets on the afternoon of June 22, 2008.

"I saw him," Andrew Bologna said from the witness stand, pointing at Ramos. "He was staring at my dad, mugging him, giving him a mean look, and that's when he pulled out a gun."

Bologna began crying as he recounted the shooting.

"I didn't know what was going on, it was like a movie," he said. "They shot my family like that, it doesn't make sense."

Bologna's mother Danielle, who was watching from the front row of the packed courtroom, sobbed throughout much of the testimony.

Prosecutors allege that Ramos, 25, of El Sobrante, shot the Bolognas after mistaking them for rival gang members and that the shooting was in retaliation for the shooting of a fellow MS-13 gang member earlier that day.

Ramos has admitted to driving the car used in the shooting, a gray Chrysler 300, but denies that he fired any shots.

Defense attorney Marla Zamora said in her opening statement in the trial on Monday that a second man, Wilfredo "Flaco" Reyes, was in the car and that Reyes was the shooter.

Andrew Bologna testified that he did not see anyone else in Ramos' car at the time of the shooting.